postcss-preset-env v10

[romainmenke]

• remove custom handling of noIsPseudoSelector for postcss-nesting. This option is no longer relevant for the latest CSS specification.
• make node 18 the lowest supported version #1371
• postcss-nesting: make edition 2024-02 the default #1370
• Improve performance of various helper packages

[romainmenke]

@Antonio-Laguna This has been open for some time and I haven't encountered any other spec changes that require a breaking change.

This change would be limited to the changes in nesting and a bump of our minimum node version.

Is there any thing you would still like to change?

If not, I suggest we ship this next week 🚀
We shipped 9.0.0 around 2023-07, so that gives us a nice interval.

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A good explanation for the aspect of nesting that was most recently changed can be found here: https://drafts.csswg.org/css-nesting/#nested-declarations-rule%E2%91%A0

We eagerly added support for this in the 2024-02 edition, even when it had not yet landed in the spec text (#1305)

I am choosing not to re-order declarations and nested rules in this new edition because we actually know that this is a major pain point and I want to give users hands on experience with what it could be if w3c/csswg-drafts#8738 is adopted.

With the recent spec edits our 2024-02 editions aligns with https://drafts.csswg.org/css-nesting/